Carbureter.



.E. 3. SMITH.

CARBURETER.

APPLICATION FILED SEPT. 2. 1915.

l ,1 96,890. I Patented Sept. 5, 1916.

2 SHEETSSHEET I. 34 33 WITNES si /J Q INVENTOR- M 36 Elmarasan gmfgc/www ATTORNEYS E. 8. SMITH.

CARBURETER.

APPLICATION FlLED-SEPT.2, 1915.

Patented Sept. 5, 1916.

2 SHEETS-SHEET 2.

-i m in Q 5 Emir-51511 1111;

M W ATTORNEYS imrrnn srarns PATENT OFFICE.

manna s. snn'rn, or NEWARK, NEW JERSEY.

GARIBURETER.

To all whom it may concern:

Be it known that I, ELMER S. SMITH, a citizen of the United States, residing at Newark, in the county of Essex and State of New Jersey, have invented certain new and useful' Improvements in Carbureters; and I do 'hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it'appertains to make and use the same, reference being had to the accompanying drawings, and to characters of reference marked thereon,'which form a part of this specification.

The present invention relates, generally,- to improvements 1n carbureters; and, this f invention has reference, more particularly,

to a novel construction of carbureter adapted to be connected with the main gasolene supply tank, wherever the same may be located, relative tothe hydro-carbon engine which the carbureter is to serve.

The invention has for its principal object to provide a simple and novel' construction .of carbureter adapted to be combined with the main gasolene supply tank in a novel and eflicient manner, either-within the tank or exteriorly thereof; and, the invention has for its further object to provide a novel construction of air-delivery means, combined with a novel'carbure ting mechanism and. a gaseous fuel-delivery means, all so combinedand related as to assure a proper performance of the carbureting function,

.even at a considerable distance from the hydro-carbon engine WhlCll is to be served, such, for example, as wb 11 the mam gaseous Other objects of the present invention not at this time more particularly enumerated, will be clearly understood fromthe following detailed description of this invention, The invention consists, primar1ly therefore, in the novel carburet'e'r hereinafter set forth; and, the invention consists, furthermore, in the novel arrangements and combinations of the several devices and parts,

Specification of Letters Patent.

as well as in the details of the construction of the said parts, all of which will be more fully described in detail in the following specification, and then finally embodied in the clauses of the claim which areappended .to and which form an essential part of said specification. p I The invention'is clearly illustrated in the accompanying drawings, in which Figure 1 is a detail longitudinal cross sec-v tion of the main vgasolene supply tank having combined therewith'the novel construction of carbureter showing one embodiment of the principlesof the present invention,

said carbureter being also shown in longitudinal cross section; and Fig. 2 is a detail horizontal section of said novel construction Patented Sept. 5, 1916, Application filed September 2, 1915. Serial No. 48,652

of carbureter, said section being taken on line' 2 2 in said Fig. 1, looking in a downhward direction. Fig. 3 is a detail longitudinal cross section of a main gasolene supply tank having combined therewith, and exteriorly connected thereto, a slightly modified'construction of my novel carbureter, the latter embodying, however,,the general principlesof the'present invention.

Similar characters of reference are employed in.all of thersaid above described views, to indicate corresponding parts.

Referringjnow to; Figs. 1 and 2 of the accompanying drawings, the referencecharacter 1 indicates a main gasolene supply tank, one wall of which, preferably the upper wall, is provided with an internally 'screw thre'aded opening 2, which is normally-closed by a,sc rew-cap 3. The said opening 2 is large enough to permit the insertion therethrough of my novel carbureter, presently tobe described, so that the same may be located within the said tank 1, and submerged in thesupply of gasolene storedin said tank 1. The said novel construction of carbureter comprises a, casing 4 of any desirable shape, the same being provided, .in' a suitable location, with a valve-body 5 having a gasolene-admission valve-opening 6, in which is arranged a suitable shut-offvalve-member 7. Said valve-opening 6 provides a means of communication between the interior of said casjug mad the interior of the main supply tank 1, so that the gasolene contained in said tank 1 may enter the control-chamber 8 provided by the interior of said casing 4. The operation of said shut-ofi' valve-member a float. 9 arranged within the control-chamber 8. Said float 9 is connected with one end of a lever 10 which is pivoted upon a' fulcrum-lug 11 formed in connection with said valve-body 5, and the opposite end of said lever 10 is provided with a bifurcated portion or fork 12 which enters an annular groove-13 formed in the head 14 of said valve-member 7. When a desired amount of gasolene enters through the valve-opening 6, so that the proper level thereof is reached in thecontrol-chamber 8, the float 9 rises, thus oscillatin the lever 10 to depress the valvemember and thereby shut off the valveopening 6 against the further admission of gasolene, until the carbureting operation withdraws gasolene from the control-chamber 8, thus lowering the level of gasolene, whereupon an opposite movement or lowering of the float 9 oscillates the lever 10 to lift. the valve-member 7, and thereby reopens the valve-opening 6 to the further admission of gasolene from the main supplytank,.these operations continuing automatically as the float 9 rises and falls.

The upper end of the casing 4 is closed by a suitable cover-member 15, which screws upon, or is otherwise suitably secured in closing relation-to said casing 4. Said cover-- member 15 is provided with a centrally located and downwardly extending tubular member 16 which terminates at its upper end in an internally screwsthreaded receiving socket 17. Said tubular member 16 terminates at its lower end, within the controlchamber 8, and short of the bottom thereof. The lower end of said tubular member 16 is provided with a closure 18 in which is fixed a centrally'located and upwardly extending jet-member 19, the lower end of which is open to communication with the interior of said control-chamber 8. Screwedlnto said receiving socket 17 is an air-tube or conduit 20 which extends upwardly through said main supply tank 1 and passes through the screw-cap 3 thereof, the same having a screw-connection with said screw-cap 3, whereby the same is held in a fixed position, and also in supporting relation to said casing 4 and its cover-member 15. Communicating with the outwardly projecting end or head 21 of said air-tube or conduit 20 is an extension 22 which may lead to any convenient point so as to communicate, if desired, with a controllable air-admission valve to be operated by the driver of an automobile, when the present invention is applied to automobile use. Said outwardly projecting end or head 21-0f said air-tube 20 is provided with an internally screw-threaded opening 23, through which passes downwardly into and through said air-tube 20, a gas-conveying tube 24, the same having a screw-threaded connection with said opening 23, whereby the same is secured in proper fixed and relative position within said air-tube. Said gasconveying tube 24 extends downwardly into said tubular member 16, and. terminates short of the bottom thereof. Said gas-conveying tube 24 is of smaller diameter than the air-tube 20, so that an air-passage 25 is provided between the same and the walls of said air-tube. The passage 26 of the gasconnected withthe manifold of the internal combustion engine to be served by the carbureter. I

The upper end of said jet-member 19 projects upwardly into the lower end of said gas-tube 24, and is provided at its termination with an inverse cone-shaped valve-seat 29. Cooperating with this valve-seat 29 is a needle-valve member 30, adapted, when manipulated, to increase or decrease the area of the jet-outlet. The stem 31 of said needle valve member 30 extends upwardly through said gas-tube 24 and is provided at its upper'end with a screw-threaded shank 32, which has a threaded connection with a bushing 33, the latter in turn having a threaded connection. with the said head-end 27 of the gas-tube 24 for fixing the same, and 'for closing the opening in said headend 27 giving admission of the needle-valve member and its stem to the gas-tube 24. The outwardly projecting end of said shank 32 is provided with a knurled fingerpiece 34 for turning said shank to raise and lower the said needle-valve member and its stem as desired, and forthe purposes above indicated.-' Said jet-member 19 is provided with a minute outlet opening or secondary jet-discharge 35 which is located in its body in such a position as to discharge into the .lower end of said tubular member 16 which forms a part of the air-passage 25 beneath the mouth of the gas-tube 24. The upper end of the jet-member 19, forming its main and normal discharge point, is maintained in the plane of the normal level of the gasolene in the control chamber 8, or slightly above such plane. While I have described a certain location for said minute outlet opening or secondary jet-discharge 35, I do not limit myself to its location in such a position, since all that is necessary or essential as to its location is that,- 'it".-be placed in a plane somewhere below the normalvlev el of the gasolene in said control chamber 8, and in position to discharge the gasolene from said jet-member so that the same will flood the lower end of said air-passage 25 and the entrance to said gas-tube 24, for the purposes to be hereinafter disclosed.

. at its. bottom portion with a depending boss 7 I f desired, the casing 4-may be formed 36. which acts as a stop or spacing member Wherebythe bottom of said casing 4 cannot gasolene to the admission-valve opening 6.

When the carbureter, constructed as herein-above described, is connected in commu nication wlth the cylinders of an internal combustion engine which it is to serve, the operation of the pistons in the cylinders of said engine'causes a suction-like action to be set up in said gas-tube 24, theieflect of which is to cause atmospheric air to rushinto said air-tube 20. Descending the passage 25 and entering the lower end of the gas-tube 24, the air rushes past the jet-member 19, the needle-valve member being raised from the seat 29, and sucks a spray of gasolene from the discharge end of said jet-member, which becomes intermixed and incorporated -with the air and forms-therewith the combustible gas or fuel. The gas. or fuel, thus produced, passes upwardly 1 through the passage 26 of the gas-tube 24, and thence through the extension. 28 to the cylinders of the engine. The gas, thus delivered, may be passed through any suitable construction of throttling or controlling mechanism located at the manifold of the engine, or in any other convenient place in the gas delivery line.

It will thus be apparent, that the present invention provides a very simple and eflective means for generating combustible fuel at a distance from the engine, if desiredfand carrying the same to a throttling means Within easy controlling reach of the operator of the engine. For example, in automobile use, the main supply tank and novel carbureter-device may be carried at the rear of the vehicle, while the carbureter thus positioned will supply the gas to a throttling means connected with the engine-manifold and Within easy reach of forward end of the vehitle. When the engine, stands idle, the gasolene from the control chamber 8 and rising in said jetmember 19,-will flow out of the minute outlet-opening or secondary jet-discharge '35,

and will use 1n said air-passage 25 and gas-;

passage 26 until it reaches the level of the gasolene in the control chamber 8. This raw charge of gasolene is termed a priming charge, since when the engine is cranked or started and suction is established in the gasthe operator at the.

lene istaken fromthemain discharge :point at the upper end of the jet-member 19, as

that provides the point of least resistance to its quick exit from the jet-member under the influence of the passing stream of air, and consequently :the secondary jet-discharge 35 is practically inoperative as an exit under ordinary conditions of operation, but operates only, or at least most effectively, when suction ceases in the gas-tube 24,'and, furthermore, by reason of its minute size and the presence of the gasolene in the jet-member there is no tendency of the air to enter said jet-member therethrou'gh, Referring now to Fig. 3 of the accompanying drawings, I have illustrated therein a slightly modified construction of carbureter which embodies, however, the same novel principles of construction and operation which comprise the subject-matter. of

the present invention. In this construction, I have slightly modified the carburetercasing and the jet-member, and have arranged the former for-exterior association with a main gasolene supply tank 1, instead of an interior association therewith. The reference-character 37 indicates a casing of any desired shape, and 38 indicates a covermember therefor. The cover-member 38 is provided in a suitable location With a valvebody 39 having at its upper end an internally s'crewethreaded receiving socket 40 into whlch screws a feed-pipe 41, the opposite end of which is secured to the main gasolene supply tank 1, in any suitable manner, and in communication therewith. Said valvebody 39 depends into the interior 42'of the casing 37, and is provided at its lower end with a valve-opening 43.. Arranged in said valve-body is a gravity shut-off valve-member 44, having a stem 45 ofsmaller diameter than the valve-opening which extends downwardly through the latter into the interior 42 of the casing 37. The operation of said shut-off valve-member 44 is automatically controlled by means of a float-member 46 arranged in the interior or-control chamber 42 of the casing 37. Said float 46 is connected.

with one end of a lever 47 which is pivoted to a fulcrum-lug 48 formed in connection with said valve-body 39, and the opposite end of said lever has a lift-portion 49, which at the proper times is carried into lifting and consequently into valve-opening relation with the free end of said valve-stem 45. The

rise and fall of the float operates the abovedescribed valve-mechanism to admit and shut off gasolene from the main supply tank Lwhereby the normal level of the gasolene in the control chamber 42 is maintained. ,Integrallyformed with said cover-.

member 38' isqawertically extending tubu lar member-50. g Said tubular member 50 extends downwardly, through the controlin the bottom of said casing 37 A nut 52,

with a suitable gasket, screwed upon said portion 51 serves to draw the cover-member 38 and casing 37 together into sealed 'relation. Said tubular member 50 is provided at its lower end, Within the casing 37, with a plurality of holes which the gasolene 1n the control-chamber 42 flows into the lower end or basin-chamber 54- of said tubular member. Said tubular member 50 is further provided with a 1ateral closing partition or wall 55 above said openings 53, which prevents gasolene from entering the interior of the upper end of said tubular member which forms an air-passage 56. The reference-character 57 indicates an adjustable jet-member which extends upwardly through the bottom of said tubular member 50, having a screw-connection. with the bottom of said' tubular member 50,

' whereby said jet-member may be adjusted bodily and vertically sage 56.

by turning the same, the lower exterior end of said jet-member having a knurled fingerpiece 58 for operatingthe same. Said jet-member extends upwardly'through said basin-chamber 54, and passes through said partitionor wall 55. Communicating with the outwardly projecting or head-end 59 of said tubular member 50 is an air-pipe or conduit 60, which may be led to any convenient point, so as to connect, if desired, with a controllable air-ad mission-valve to be operated by the driver of an automobile, when the present invention is applied for automobile use. Said outwardly projecting or tubular member 50 is provided with an internally threaded opening 61, through which passes downwardly into and through the airpassage 56 a gas-conveying tube 62, the same having a threaded connection, withsaid opening 61, whereby the same is secured in proper fixed position within said air-pas Said gas-conveying tube 62 terminates at its lower end, short of the bottom of said air-passage 56 formed -*by the partition or wall 55; The passage 63 of said gastube provides a path through. which the gas formed by the admixture of gasolene and air exits from the. carbureter. The outwardly projecting or head end 64 of said gas-tube is provided with a communicating gas-pipe or conduit 65, which may be led to a gas-admission and control valve-mechanism connected ternal combustion engine'to be served by the carbureter. The upper end of said jet-member 57 projects upwardly into the lower end or openings 53 through head-end 59 of said with the manifold of the inseat is a needle valve-member 67, the stem 68, l

of which extends upwardly through said gas-passage 63, and is provided at its upper end with a screw-threaded shank 69 which has a threaded connection with the head-end of said gas-tube 62. The exterior end of said shank 69 has a knurled 'fingerpiece 70 for manipulating said valve-stem and 1 valvemember.. Said jet-member 57 is'provided with a tubular passage 71 terminating at its upper end in the valve-seat 66 and closed at its lower end. Communicating with the lower end of the passage 71 is an intake port or opening 72, flows from said basin-chamber 5i into the passage 71. Said jet-member 57 is provided with a minute outlet-opening or secondary jet-discharge 73, which is located so as to discharge gasolene, at the proper times, into said tubular member 50 above the partition or wall 55.

The operation of the modified construction of carbureter just described is substantially the same, and is governed by the same principles, and produces the same advantageous results as already described hereinabove in connection with the first-described construction of carburetor, so that a further description of'such operations is rendered unnecessary. It is to'be further noted, that in both constructi6ns of -carbureters, the tubular member 16 of one, and the tubular member 50 of the other, is provided with an opening 74 which admits air into the float-chamber of the carbureters so that a proper flow of gasolene to the respective jetmembers thereof is assured I am aware that some changes may be made in the general arrangements-and combinations of the various devices and parts as well as in the details of the construction of the said parts, Without departingfrom the through which the gasolene the said specification, nor do I confine myself to the exact details of the construction of the said parts, as illustratedin the accompanying drawings.

1. The combination with a main gasolene supply tank, of an inclosed control-chamber having a float-controlled gasolene-admission valve-mechanism, air-conveying means in communication with the atmosphere entering said control chamber, said air-conveying means being closed at its bottom end, a gas-discharge means extending telescopically into said air-conveying means and terminating short of the bottom of said airconveying means so as to communicate at that point therewith, a jet-member communicating at its lower end with said control chamber and extending through the bottom of said air-conveying means upwardly into the lower end of said gas-discharge means, and means connected with the outer end of said gas-discharge means for conveying gas to an internal combustion engine.

2. The combination with a main gasolene supply tank, of an inclosedcontrol-chamber having a float-controlled gasolene-admission valve-mechanism, air -conveying means in communication with the atmosphere entering said control-chamber, said air-conveying means being closed at its bottom end, a gas-discharge means extending telescopically into said air-conveying means and terminating short of the bottom of said airconveying means so as to communicate at that point therewith, a jet-member communicating at its lower end with said controlchamber and extending through the bottom of said air-conveying means upwardly into the lower end of said gas-discharge means,

and means connected with the outer end of said gas-discharge means for conveying gas to an internal combustion engine, said jetmember having a secondary minute discharge-opening located in a plane below the normal level of gasolene in said controlchamber and discharging into the lower end of said air-conveying means.

8. The combination with a main gasolene supply tank, of a tubular member providing an air-passage closed-at its bottom end entering said tank and its contents, said tubular member being open at its outer end to atmospheric air, a second tubular member open at its bottom end and providing a gasdischarge passage, said second tubular member being of smaller diameter than said first tubular member and being arranged to extend downwardly through said first tubular member but terminating short of the lower closed end of the latter, the outer end of said second tubular member having .a gasconveying pipe connected therewith and adapted to be led to an internal combustion engine, a jet-member extending through the closed lower end of said first tubular member so that its upper discharge end enters the lower open end of said second tubular member, and means connected with the lower end of said first tubular member for regu- In testimony, that I claim the invention set forth above I have hereunto set my hand this 28th day of August, 1915.

ELMER S. SMITH."

Witnesses:

GEORGE Di'RicnAnos, FREDK. I. O. F RAENTZEL. 

